Temporal coherency of LD light measurement by the use a polarimetric fiber-optic strain sensor

In this paper we present a new non-interferometric method of temporal coherency of light measurement. The method is based on the application of a polarimetric fiber-optic strain sensor in which the dynamics of an output signal depends on the degree of polarization and on the same coherency of light coupled to a sensor. The method is particularly useful for measurements of light emitted by diodes for which interferometric methods are very inconvenient. Theoretical analysis of the method is based on the Mueller-Stokes matrix equation modified by an additional depolarization matrix. The method was tested for LD under threshold light.